Listing default quotas with the OpenStack command line client will
provide all quotas for storage and network services. Previously, the
cinder quota-defaults command would list only storage
quotas. You can use $PROJECT_ID or $PROJECT_NAME arguments to
show Block Storage service quotas. If the $PROJECT_ID argument returns
errors in locating resources, use $PROJECT_NAME.

Administrative users can edit and update Block Storage
service quotas.

To update a default value for a new project,
update the property in the cinder.quota
section of the /etc/cinder/cinder.conf file.
For more information, see the Block Storage service
in OpenStack Configuration Reference.

To update Block Storage service quotas for an existing project

$ openstack quota set --QUOTA_NAME QUOTA_VALUE PROJECT_ID

Replace QUOTA_NAME with the quota that is to be updated,
QUOTA_VALUE with the required new value. Use the openstack quota show
command with PROJECT_ID, which is the required project ID.